NC Dept. of Transportation County Boundaries

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently-anticipated questions:

What does this data set describe?

Title: NC Dept. of Transportation County Boundaries
Abstract:
A GIS data layer created by the North Carolina Department of Transportation (NCDOT) representing county boundaries as defined by various best sources available.
  1. How should this data set be cited?

    North Carolina Department of Transportation, 20050331, NC Dept. of Transportation County Boundaries.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.422111
    East_Bounding_Coordinate: -75.416034
    North_Bounding_Coordinate: 36.617254
    South_Bounding_Coordinate: 33.730557

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: unknown
    Currentness_Reference: Date release date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (100)
      • Label point (100)
      • GT-polygon composed of chains (100)
      • Point (4)
      • Label point (152)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 34.333333
      Standard_Parallel: 36.166667
      Longitude_of_Central_Meridian: -79.000000
      Latitude_of_Projection_Origin: 33.750000
      False_Easting: 2000000.002617
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.004096
      Ordinates (y-coordinates) are specified to the nearest 0.004096
      Planar coordinates are specified in survey feet

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    onemap_prod.SDEADMIN.cb_dot
    Boundary extents of counties (Source: NCDOT)

    NAME
    County name (Source: NC DOT)

    Variable by county

    SHAPE.len

    PERIMETER
    Total perimeter in coverage units (Source: Software computed)

    Frequency of measurement: None planned

    Range of values
    Minimum:378533.94148
    Maximum:1056454.07880
    Units:meters
    Resolution:0.001

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    FIPS
    US FIPS code (Source: NC DOT)

    Variable

    SHAPE.area

    onemap_prod.SDEADMIN.cb_dot.AREA

    County boundaries
    Boundary extents of counties (Source: NCDOT)

    FNODE#
    Internal node number for the beginning of an arc (from-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    TNODE#
    Internal node number for the end of an arc (to-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    LPOLY#
    Internal node number for the left polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    RPOLY#
    Internal node number for the right polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    LENGTH
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    DOT-CB-SP83FT#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    DOT-CB-SP83FT-ID
    User-defined feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    IGDS-LAYER
    Layer created in conversion from Microstation to Arc/Info (Source: NCDOT)

    ValueDefinition
    DEFAULTDefault layer

    IGDS-TYPE
    Microstation element type (Source: NCDOT)

    variable

    IGDS-LEVEL
    The level for Microstation layer created from the conversion to Arc/Info (Source: NCDOT)

    ValueDefinition
    25Disputed
    27Provided by county and not disputed
    29Water Feature
    30Unknown
    31Mountain Ridge
    32County Line Road Feature
    35NCGS Line
    37State Line

    IGDS-GGNO
    Microstation element type (Source: NCDOT)

    variable

    IGDS-CLASS
    Microstation element type (Source: NCDOT)

    variable

    IGDS-PROPS
    Microstation element type (Source: NCDOT)

    variable

    IGDS-COLOR
    Microstation color type (Source: NCDOT)

    variable

    IGDS-STYLE
    Microstation style type (Source: NCDOT)

    variable

    IGDS-WEIGHT
    Microstation weight type (Source: NCDOT)

    variable

    IGDS-TEXT
    Microstation text type (Source: NCDOT)

    variable

    IGDS-FONT
    Microstation font type (Source: NCDOT)

    variable

    IGDS-CPXID
    Microstation element type (Source: NCDOT)

    variable

    IGDS-CPXTYPE
    Microstation element type (Source: NCDOT)

    variable

    IGDS-OFFSET
    Microstation element type (Source: NCDOT)

    variable

    DESCRIP
    Description of level type (see above) (Source: NCDOT)

    variable

    dot-cb-sp83ft.tatigds
    unknown (Source: NCDOT)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    IGDS#
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    IGDS-ID
    User-defined feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    North Carolina Department of Transportation
    c/o Geographic Information Systems
    3401 Carl Sandburg Court
    Raleigh, NC 27610
    United States

    919-212-6000 (voice)
    919-2002-5999 (FAX)
    gishelp@dot.state.nc.us

Why was the data set created?

This GIS data layer was created to assist government agencies and others in making resource management decisions.

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 1)
    NC DOT - GIS Unit, unknown, County Boundaries - NCDOT: NC DOT - GIS Unit, Raleigh, NC.

    Other_Citation_Details: None
    Type_of_Source_Media: digital tape media
    Source_Scale_Denominator: 24,000
    Source_Contribution: Digital County Boundary Files

  2. How were the data generated, processed, and modified?

    Date: Unknown (process 1 of 3)
    Unknown

    Person who carried out this activity:

    NCDOT- GIS Unit
    1020 Birchridge Rd.
    Raleigh, NC 27611
    U.S.A.

    (919) 250-4187 (voice)
    (919) 212-3103 (FAX)

    Hours_of_Service: 8:00 am to 5:00 pm
    Contact_Instructions: Phone or Fax contacted preferred
    (process 2 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\david\LOCALS~1\Temp\xml170.tmp

    (process 3 of 3)
    Dataset copied.

    Data sources used in this process:

    • Server=207.192.29.55; Service=5151; Database=onemap_test; User=sdeadmin; Version=sde.DEFAULT

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Unknown

  2. How accurate are the geographic locations?

    Unknown

  3. How accurate are the heights or depths?

    There is no vertical dimension to this data layer.

  4. Where are the gaps in the data? What is missing?

    These data represent the county boundaries in North Carolina as determined by the North Carolina Department of Transportation.

  5. How consistent are the relationships among the observations, including topology?

    Unknown

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
This GIS data layer is a NC Department of Transportation unrestricted data set.
Use_Constraints:
Data layer is for specific NC Department of Transportation use. There is no guarantee of accuracy, completeness, or fitness of use.

  1. Who distributes the data set? (Distributor 1 of 1)

    NC Center for Geographic Information and Analysis
    Data Distribution
    301 North Wilmington Street, Suite 700
    Raleigh, NC 27601
    United States

    919-733-2090 (voice)
    (919) 715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
  2. What's the catalog number I need to order this data set?

    County Boundaries - NCDOT

  3. What legal disclaimers am I supposed to read?

    NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.

  6. What hardware or software do I need in order to use the data set?

    All formats supplied are created using ARC/INFO GIS software. Other formats are available. Format compatibility is the user's responsibility. For current FORMAT/MEDIA INFORMATION, use a web browser: <http://www.cgia.state.nc.us/cost.html>

Who wrote the metadata?

Dates:
Last modified: 02-Oct-2006
Metadata author:
NC Center for Geographic Information and Analysis
c/o Database Administrator
301 North Wilmington Street, Suite 700
Raleigh, NC 27601
United States

919-733-2090 (voice)
(919) 715-0725 (FAX)
dataq@ncmail.net

Hours_of_Service: 8:30AM - 5:30PM
Contact_Instructions: Phone and electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.5 on Wed Aug 18 08:30:06 2010